Lock



R. WHEELER May 13, 1930.

LOCK

Filed Jan. 5. 1929 2 sheets-sheet l BY i ATTORNEY////////////Jf///////////I R. WHEELER May 13, 1930.

LOCK

Filed Jan. 5, 1929 2 sheets-snee:

INVENTOR Faer' 7W? S E S S E N H W BY ze);

ATTORNEY Patented May 13, 1930 UNITED STATES ROBERT WHEELER, FWELLSBURG, WEST VIRGINIA LOCK Application led January 5, 1929. SerialNo. 330,547.

My invention relates to gravity locks, and consists in the construction,arrangement and combination of parts as set forth in the followingspecification.

It is an object of my invention to provide a lock wherein the bolt isprojected by gravity, eliminating the use of springs.

A further object of the invention is to provide a simple locking means,whereby manipulation of the bolt, from the outside of a door isprevented.

A still further object of the invention is the provision of a lock whichcannot be picked or operated by the use of skeleton keys or the like.

Additional objects'and features of invention will be apparent from t-hefollowing description and accompanying drawings forming a part of thisspecification, wherein- Figure 1 is a fragmentary perspective view of adoor, partly in section equipped with my lock.

Figure 2 is a side view of the lock, the cover plate having beenremoved, and showing the bolt projected.

Figure 3 is a similar view showing the position of the parts with thebolt in retracted position.

Figure 4 is a cross section on the line 4-4 30 of Figure 2.

Figure 5 is a cross section on the line 5-5 of Figure 2. b Figure 6 is aperspective view of the latch Figure 7 is a perspective view of theweight.

Figure 8 is a detail perspective view of the key-operated bolt.

Figure 9 is a detail perspective view of the latch detent.

Figure 10 is a detail perspective view of the latch operating means.

Figures 11 and 12 illustrate the key and operating means.

There is illustrated a mortise lock 1 having a casing 2, which may be ofany well known construction, and in the present instance is shown asrectangular, having a base 3 and cover plate 4r. The base 3 and coverplate 4 are apertured as at 5, for a purpose hereine after explained.

The latch-operating means 6 comprises a tubular portion 7 terminating intrunnions 8, these t-runnions being j ourn alled in the apertures 5 ofthe base and cover plate. The tubular portion 7 is provided with asquared opening 9, for reception of a well known operating shaft 10.

At diamctrically opposite sides of the tubular member 7 and formedintegrally therewith, I provide cam portions 11, which co-act withshoulders 11a of the bolt to cause retraction thereof upon rotation ofthe shaft 10, as will be more fully explained.

A bolt 12 is slidably engaged through one end of the case 2, the bolthaving an enlarged portion 13, cut away as at 14 for reception of thecam portion 11. The central portion of the enlargement is provided witha semicircular recess 15 for engagement around the tubular portion 7.Upon the bolt 12, intermediate its ends, I provide lugs 16 and 16disposed on opposite sides of the bolt, as clearly shown in Figure 6.

A weight 17 is eccentrica-Hy mounted within the case 2, the portionadjacent its pivot 18 being cut away to form a recess 19 of a shape to tover the enlargement 13. The weight 17 has a bill 20 adjacent the pivot18, the bill being of a length to engage within the space providedbetween the enlargement 13 and the lug 16.

In the present construction I provide means for locking the bolt 12against movement, from either side of the casing 2, and this is eiectedthrough the bolt 21, aswill now be explained. The bolt 21is slidablysupported upon the lower partof the case 2, and is provided with anopening 22 for reception of a suitable key which may be inserted throughthe key-hole 23 of the case 2. The upper part of the bolt body is curvedas at 24L to conform to the recess 25 upon the lower side of the weight17. The bolt 21 thus supports the weight 17 so as to prevent unduefriction between the enlargement 13 and the weight 17 The front portionof the bolt is provided with a shoulder 26 adapted to receive a detent27, (see Fie'. 2). The bolt 2l has a rearwardly extending leg portion28, the upper surface of which is recessed as at 29 to receive the lug30 of the latch 31. From the foregoing, it will be noted that the latch31 serves the dual function of retaining the bolt 21 in properalignment, as well as being the means for establishing lockingengagement between the detent 27 and bolt 12.

The detent 27 is eccentrically mounted within the case 2, as at 32, andhas angularly disposed bill portions 33 and 34. The bill 33 is arrangedso as to be engaged between the lug 16 and enlargement 13 of bolt 12,while the bill 34 is positioned so asto engage within the shoulder 26,at times.

In the operation of my lock, the shaft 1() is turned, in eitherdirection, such movement imparting motion to the operating means 6. andconsequently retracting the bolt 12 by virtue of Contact between one ofthe cam portions 11 and the shoulders 11a of the bolt. Iearward movementof the bolt 12 imparts an upward swing to the weight 17 by reason ofengagement of the bill 20 with the lug 16. Upon release of the shaft 10,the weight 17 will fall, by gravity, urging the bolt 12 into projectedposition.

In the event that it is desired to lock the bolt 12 against retraction,a key not shown may be inserted through the key hole 23 and rotated,thereby engaging the front wall of f the opening 22 of bolt 21, movingit forwardly so-that the shoulder 26 engages beneath the. bill 34, andthe detent 27 the bill 33 of which engages lug 16 of the bolt 12 thusvpreventing movement of the shaft 10, as will be readily understood froma consideration of Fig. 2.

rIjhe'occasion may arise where it would be desirable to preventoperation of the latch from one side of a door equipped with my lock,and this may be accomplished by manip.- ulation of the key 35 which isdesigned to be inserted lengthwise in a sleeve 31 mounted in .the lockcasing at the rear of bolt 21. Thissleeve has a laterally extending wingor lug 30 positioned in the path of bolt 21 so that movement of the key35 in a clockwise direction, as viewed in Figure 2) will rotate the lug30, causing it to engage the rear edge of the bolt 21 and slide intoengagement with the bill34. IVith the lug 30 in the position shown inFigure 2 it will be seen that the shaft 10 is effectively locked againstrotation, and the bolt 21 cannot be manipulated by a key insertedthrough the key-hole 23, since the lug 30 prevents rearward movement ofthe bolt 21. Release of the bolt can only be effected throughcounter-clockwise movement of the key 35 to position the lug 30 as shownin Figure 3.

I claim:

1. In a lock, the combination of a case, a bolt projectable through oneside thereof, said bolt being provided with a recessed enlargev againstswinging movement when the bolt is in its projected position.

2. In a lock, the combination of a case, a bolt projectable through oneside thereof, said bolt being formed with lugs and an enlargement toprovide a top notch and a bottom notch, knob operating means for thebolt,

an eccentrically mounted weight within the case having a bill engagingin the upper notch of the bolt and normally urging said bolt intoprojected position, a pivoted detent below the bolt having a bill withinthe lower notch which causes the detent to swing with the projection andretraction of the bolt, and key operated means for locking the detentagainst swinging movement when the bolt is projected.

3. In a lock, the combination of a case, a bol-t projectable through oneside thereof, said bolt being` formed with lugs and an enlargement toprovide a top notch and a bottom notch, knob operating means for thebolt, an eccentrically mounted weight within the case having a billengaging in the upper notch of the bolt and normally urging saidboltinto projected position, a pivoted detent below the bolt having abill within the lower bolt projectable through one side thereof, saidbolt being formed with lugs and an enlargement to provide a top notchand a bottom notch, knob operating means for the bolt, an eccentricallymountedweight within the case having a bill engaging in the upper notchof the bolt and normally urging said bolt into projected position, apivoted detent below the bolt having a bill within the lower notch whichcauses the detent to swing with the projection and retraction of thebolt, a second billor extension formed on the detent adapted to bespaced from the walls of the casing when the bolt is proj-ected and asecond bolt located within the casing and adapted to be shiftedlongitudinally by a key for bringing the same beneath the second bill ofthe detent and locking said detent against swinging movement.

5. In a lock, the combination of a case, a bolt projectable through oneside thereof, said bolt being formed with lugs and an enlargement toprovide a, top notch and a, bottom notch, knob opera-ting means for thebolt, an eccentrically mounted Weight Within the case having a billengaging in the upper notch of the bolt and normally urging said boltinto projected position, a pivoted detent below the bolt having a billWithin the lower notch which causes the detent to swing with theprojection and retraction of the bolt, a second bill or extension formedon the detent adapted to be spaced from the Walls of the casing When thebolt is projected, et second bolt located Within the casing and adaptedto be shifted longitudinally by a key for bringing the same beneath thesecond bill of the detent and locking said detent against swingingmovement and key operated means for locking the second bolt in itsengaging position with said detent.

ROBERT WHEELER.

